Heat recovery potential and electrical performances in-field investigation on a hybrid PVT module

2017 ◽  
Vol 205 ◽  
pp. 44-56 ◽  
Author(s):  
Diego Vittorini ◽  
Nicola Castellucci ◽  
Roberto Cipollone
Keyword(s):  
Heat Recovery ◽  
Field Investigation ◽  
Recovery Potential

scholarly journals Heat Pump Bridge Analysis Using the Modified Energy Transfer Diagram

Energies ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 137
Author(s):  
Florian Schlosser ◽  
Heinrich Wiebe ◽  
Timothy G. Walmsley ◽  
Martin J. Atkins ◽  
Michael R. W. Walmsley ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Heat Pump ◽  
Heat Recovery ◽  
Heat Pumps ◽  
Coefficient Of Performance ◽  
Combined Application ◽  
Recovery Potential ◽  
Composite Curve ◽  
And Performance ◽  
The Individual

Heat pumps are the key technology to decarbonise thermal processes by upgrading industrial surplus heat using renewable electricity. Existing insight-based integration methods refer to the idealised Grand Composite Curve requiring the full exploitation of heat recovery potential but leave the question of how to deal with technical or economic limitations unanswered. In this work, a novel Heat Pump Bridge Analysis (HPBA) is introduced for practically targeting technical and economic heat pump potential by applying Coefficient of Performance curves into the Modified Energy Transfer Diagram (METD). Removing cross-Pinch violations and operating heat exchangers at minimum approach temperatures by combined application of Bridge Analysis increases the heat recovery rate and reduce the temperature lift to be pumped at the same time. The insight-based METD allows the individual matching of heat surpluses and deficits of individual streams with the capabilities and performance of different market-available heat pump concepts. For an illustrative example, the presented modifications based on HPBA increase the economically viable share of the technical heat pump potential from 61% to 79%.

Analytical and Experimental Study of Potential Heat Recovery From Household Refrigerators

2004 ◽  
Author(s):  
Jessica Todd
Keyword(s):  
Experimental Data ◽  
Heat Exchanger ◽  
Heat Recovery ◽  
Waste Heat ◽  
Tap Water ◽  
Economic Feasibility ◽  
Hot Water ◽  
Coil Design ◽  
Waste Heat Recovery System ◽  
Recovery Potential

Opportunities for waste recovery exist in many types of industrial devices as summarized by Kreith and West [1]. However, no experimental data regarding the potential of heat recovery from household refrigerators have been published in open literature. The decision to implement a heat recovery option depends mostly on convenience and cost. In some cases, however, the decision is difficult because there is a lack of reliable information of the payback for a potential application. This article provides useful information for the design and payback of a waste heat recovery system on a household refrigerator. This paper presents experimental and analytical results of energy recovery potential from the heat rejected by the condenser coils of a household refrigerator. Using a small heat exchanger affixed to the condenser coils, the heat thus recovered can preheat domestic tap water. The analytical study considered three designs: A heat exchanger with the refrigerant condensing on the outside of water pipes, refrigerant on the inside of a counter-flow heat exchanger, and the refrigerant condensing inside a serpentine coil enclosed by a container filled with household tap water. Considering economic feasibility and manufacturing ease, the serpentine coil design was chosen. Experimental data confirmed the heat recovery possibility from the condenser coils. The serpentine coil design can achieve a payback time of 2 to 10 years dependent on whether the domestic hot water uses electric or gas heating.

scholarly journals Low enthalpy heat recovery potential from coal mine discharges in the South Wales Coalfield

2016 ◽  
Vol 164 ◽  
pp. 92-103 ◽  
Author(s):  
Gareth Farr ◽  
Sivachidambaram Sadasivam ◽  
Manju ◽  
Ian.A. Watson ◽  
Hywel.R. Thomas ◽  
...  
Keyword(s):  
Coal Mine ◽  
Heat Recovery ◽  
The South ◽  
Recovery Potential ◽  
South Wales

scholarly journals Study Of The Heat Recovery Potential Of Water-to-air Heat Pumps In A Closed-loop System In Office Buildings

2020 ◽  
Author(s):  
JUAN FRANCISCO BELMONTE ◽  
MINERVA DIAZ-HERAS ◽  
JOSE DOMINGO MOYA ◽  
JUAN IGNACIO CORCOLES ◽  
JOSE ANTONIO ALMENDROS-IBAÑEZ ◽  
...  
Keyword(s):  
Heat Recovery ◽  
Closed Loop ◽  
Heat Pumps ◽  
Loop System ◽  
Office Buildings ◽  
Closed Loop System ◽  
Recovery Potential

scholarly journals Effects of Intercooling and Inter-Stage Heat Recovery on the Performance of Two-Stage Transcritical CO2 Cycles for Residential Heating Applications

Energies ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4763
Author(s):  
Juanli Ma ◽  
Ahmad Mhanna ◽  
Neil Juan ◽  
Monica Brands ◽  
Alan S. Fung
Keyword(s):  
Heat Recovery ◽  
Performance Enhancement ◽  
Two Stage ◽  
Heat Rejection ◽  
Heating Performance ◽  
Recovery Potential ◽  
Residential Heating ◽  
Carbon Dioxide Co2 ◽  
Discharge Pressure ◽  
Harmful Effects

Due to the harmful effects of synthetic refrigerants, such as chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs)n the environment, natural refrigerants like carbon dioxide (CO2) have been attracting great interest. The higher inter-stage superheating of CO2 makes it difficult to predict the effects of the intercooling on heating performance of a two-stage transcritical CO2 cycle. In addition, very little is known about the potential of inter-stage heat rejection recovery in the heating performance enhancement of this cycle. In order to explore the effects of intercooling and inter-stage heat rejection recovery potential, three “sub-cycles”—(1) a sub-cycle with heat recovery, (2) a sub-cycle without heat recovery, and (3) a sub-cycle without intercooling—were modeled in Engineering Equation Solver (EES) software for three commonly-used two-stage transcritical cycles: (1) an intercooler cycle, (2) a flash cycle, and (3) a split cycle. Then, the discharge pressure and intermediate pressure were simultaneously optimized. Based on the optimization results, the heating performance of the sub-cycles for each cycle were compared. The results demonstrate that the incorporation of intercooling without heat recovery was detrimental to the heating performance in comparison to the absence of intercooling. It is also clear that there is a great potential for heating performance improvement through inter-stage heat recovery.

POTENTIAL WASTE HEAT RECOVERY ANALYSIS FROM MOLTEN STEEL SLAG: THE CASE STUDY OF SIDENOR STEELWORKS IN BASAURI (SPAIN)

2021 ◽  
pp. 1-18
Author(s):  
Iñigo Ortega-Fernandez ◽  
Peru Arribalzaga ◽  
Daniel Bielsa ◽  
Leixuri Fernández ◽  
Iñigo Unamuno
Keyword(s):  
Heat Recovery ◽  
Molten Slag ◽  
Waste Heat ◽  
Steel Slag ◽  
Industrial Sector ◽  
Maximum Energy ◽  
Piping System ◽  
Main Process ◽  
Technical Solution ◽  
Recovery Potential

Abstract Every day huge amount of energy is released to the atmosphere in form of waste heat. The search of a cleaner and more efficient society, not only at industrial level but also at domestic level, should avoid this type of emissions. Steelmaking is an example of an industrial sector with high optimization potential in energy management. In this line, this work presents the main outcomes of the investigation carried out in the search of a technical solution for heat capture and reutilization from one of the main waste heat streams in the steelworks, the molten slag. For this purpose, a piping system embedded in the slag pit soil is proposed as satisfactory solution for the heat capture operation. Besides, the internal applicability of this recovered heat is also addressed. Overall, the analysis carried out allows the identification of the main process parameters that limit the heat recovery potential from the molten slag. At the same time, the investigation provides accurate results of the maximum energy that can be recovered from the slag if the proposed technology is implemented (around 306 kWht per casting, what represents the 6.3% of the total available energy). The work is completed with a preliminary techno-economic analysis to conclude with the viability assessment. This analysis shows a depreciated payback period of the proposed technology below 7 years.

scholarly journals Heat recovery potential of mine water treatment systems in Great Britain

2016 ◽  
Vol 164 ◽  
pp. 77-84 ◽  
Author(s):  
M.T. Bailey ◽  
C.J. Gandy ◽  
I.A. Watson ◽  
L.M. Wyatt ◽  
A.P. Jarvis
Keyword(s):  
Great Britain ◽  
Water Treatment ◽  
Mine Water ◽  
Heat Recovery ◽  
Recovery Potential ◽  
Mine Water Treatment

scholarly journals Analysis of potential waste heat recovery from a stenter in a textile plant

DYNA ◽  
2021 ◽  
Vol 88 (217) ◽  
pp. 292-302
Author(s):  
Karen Paola Cacua ◽  
Ricardo Mazo-Restrepo ◽  
Pedro Alvarado
Keyword(s):  
Thermal Energy ◽  
Heat Recovery ◽  
Waste Heat ◽  
Heat Setting ◽  
Promising Alternative ◽  
Recovery Potential ◽  
Setting Process ◽  
Total Input ◽  
Energy Balances ◽  
Mass And Energy Balances

The textile sector, an important economic driving force in Antioquia, Colombia, uses great quantities of thermal energy mainly produced by coal combustion, which holds enormous potential for recovery. One of the most common processes in a textile plant is heat setting, which uses a significant amount of thermal energy to adjust the properties of fabrics, such as shrinking, stiffness, pull strength, width, and stretching. In this study, we calculate the mass and energy balances of a stenter and propose a system to recover the energy available in its exhaust gases. The energy recovery potential in this heat setting process is 800.97 kW, which represents 87.2% of the total input energy. Additionally, we evaluate different heat exchangers to recover the available heat and present criteria to select them. Finally, thermosyphons, whose thermal efficiency was theoretically determined here, offer a promising alternative for heat recovery from actual stenters.

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